Module: Flow Tracing
(c) 2001 by O.Conrad
Menu: Terrain Analysis > Hydrology > Catchment Area
Description
Flow tracing algorithms for calculations of flow accumulation and related parameters. These algorithms trace the flow of each cell in a DEM separately until it finally leaves the DEM or ends in a sink.

References:

Rho 8 (this implementation adopted the original algorithm only for the flow routing and will give quite different results):
- Fairfield, J. / Leymarie, P. (1991):
'Drainage networks from grid digital elevation models',
Water Resources Research, 27:709-717

Kinematic Routing Algorithm:
- Lea, N.L. (1992):
'An aspect driven kinematic routing algorithm',
in: Parsons, A.J., Abrahams, A.D. (Eds.), 'Overland Flow: hydraulics and erosion mechanics', London, 147-175

DEMON:
- Costa-Cabral, M. / Burges, S.J. (1994):
'Digital Elevation Model Networks (DEMON): a model of flow over hillslopes for computation of contributing and dispersal areas',
Water Resources Research, 30:1681-1692


Parameters
NameTypeIdentifierDescriptionConstraints
Input
Elevation Grid (input)ELEVATION
Sink Routes (*)Grid (optional input)SINKROUTE
Weight (*)Grid (optional input)WEIGHT
Output
Catchment AreaGrid (output)CAREA
Catchment Height (*)Grid (optional output)CHEIGHT
Catchment Slope (*)Grid (optional output)CSLOPE
Options
StepIntegerSTEPMinimum: 1.000000
MethodChoiceMethodAvailable Choices:
[0] Rho 8
[1] Kinematic Routing Algorithm
[2] DEMON
DEMON - Min. DQVFloating pointMINDQVDEMON - Minium Drainage Quota Volume (DQV) for traced flow tubesValue Range: 0.000000 - 1.000000
Flow CorrectionBooleanCORRECT
(*) optional